1. Cellular Respiration
Michael Slemp

2. BELL WORK
Compare and contrast the similarities and differences of light dependent reactions to that of light independent reactions.
USE COMPLETE SENTENCES AND BE DETAILED!!!!!

3. Review of photosynthesis
What is the definition of photosynthesis?
What ingredients do you need for photosynthesis?
Name the organelle where photosynthesis occurs?
What is the function of chlorophyll and where is it found?
Name the 2 stages of photosynthesis. Where do they take place? (be specific)
Briefly describe stage 1
Briefly describe stage 2
What is the final product?
You can work with your partner to come up with the answers.

4. Review of photosynthesis
Important information! Make sure you know it!
What is the definition of photosynthesis?
What ingredients do you need for photosynthesis?
Name the organelle where photosynthesis occurs?
What is the function of chlorophyll and where is it found?
It’s a process in which plants capture energy from sunlight and converts it into chemical energy of sugars (glucose)
Sunlight energy, carbon dioxide and water
Chloroplast
To absorb sunlight (red and blue wavelengths), found on the thylakoids

5. Briefly describe stage 1
Name the 2 stages of photosynthesis. Where do they take place? (be specific)
Briefly describe stage 1
Briefly describe stage 2
What is the final product?
Stage 1 = light-dependent happens on thylakoinds
Stage 2 = light-independent happens in stroma
Light-dependent: chlorophyll captures sunlight energy, water
molecule is broken down, oxygen is released and energy is transferred to molecules that carry energy (like ATP)
Light-independent: uses energy from light-dependent reaction, carbon dioxide is added to a cycle of reactions to form larger molecules, molecule of simple sugar (glucose) is formed
Glucose and oxygen

6. Energy rich molecule (glucose)
Sunlight energy
Photosynthesis
We have just reviewed
Remember this slide from last class?
Plants, animals and humans use glucose as source of energy
Will be talking about today

7. What happens when we eat?
Digestion
Complex molecules
Simple molecules (like glucose)
Remember ? Glucose is too large to be used by cells (it’s the $100 bill). All cells need energy in smaller units called ATP (this is your $1 bill)
Glucose is transported into cells

8. How cell makes ATP from glucose?
Making ATP is complex process involving multiple steps and enzymes.
We will learn the simplified version today.
Use blank sheet in your notebook (landscape)
Draw animal cell in the middle, include all major parts (do not forget mitochondria).
Make sure you have enough space on both sides of the picture for adding notes.

9. How cell makes ATP from glucose?
Add notes to your picture as you see on this slide. Make sure you have room for more notes!!!
Products of glycolysis enters mitochondria and undergoes 2-stage process called CELLULAR RESPIRATION
When glucose enters cell it undergoes in cytoplasm a process called GLYCOLYSIS
(glyco = sugar, lysis = break down)

10. How cell makes ATP from glucose?
Add notes on the left side of your cell drawing
GLYCOLYSIS
Splits glucose molecule into two three-carbon molecules and makes 2 ATP molecules
Remember formula for glucose? C6H12O6 = 6 carbons 1 2 3 4 5 6 1 2 3 + 4 5 6
+ 2 ATP
glucose
Two 3-carbon molecules

11. How cell makes ATP from glucose?
Add notes on the left side of your cell drawing
GLYCOLYSIS
Happens in cytoplasm
Process that does not require oxygen = anaerobic process
Final product:
Two 3-carbon molecules (enters into mitochondria)
2 ATP molecules (energy usable by cell)

12. Discuss with your partner.
Pair Share
Discuss with your partner.
1. Definition of glycolysis
2. Where in cell does glycolysis happen?
3. What does anaerobic process means?
4. What are the final products of glycolysis?

13. Process that does not require oxygen = anaerobic process
Pair Share
GLYCOLYSIS
Splits glucose molecule into two three-carbon molecules and makes 2 ATP molecules
Happens in cytoplasm
Process that does not require oxygen = anaerobic process
Final product:
Two 3-carbon molecules (enters into mitochondria
2 ATP molecules (energy usable by cell)

14. How cell makes ATP from glucose?
Add notes on the right side of your cell drawing
CELLULAR RESPIRATION Releases chemical energy from sugars (and other carbon-based molecules) to make ATP when oxygen is present (aerobic process)
You can think of it as opposite of photosynthesis glucose + oxygen = carbon dioxide + water + ATP
Cellular respiration happens in 2 steps inside of mitochondria

15. How cell makes ATP from glucose?
Add notes on the right side of your cell drawing
Lets draw a mitochindria
Inner membrane (stage 2 of cellular respiration)
Outer membrane
Matrix = fluid inside mitochindria (stage 1 of cellular respiration)

16. How cell makes ATP from glucose?
Add notes on the right side of your cell drawing
CELLULAR RESPIRATION
Stage 1 = Krebs cycle Produces molecules that carry energy into the 2nd stage
Remember the final product of glycolysis? Two 3-carbon molecules
3-carbon molecules are broken down in cycle of chemical reactions
Happens in the matrix of mitochondria

17. How cell makes ATP from glucose?
Add notes on the right side of your cell drawing
CELLULAR RESPIRATION
Stage 1 = Krebs cycle
Final products: small number of ATP (ready to be used by cell) carbon dioxide is released energy-carrying molecules (other than ATP)
Remember, we said ATP is like $1.00 bill? Well, other energy-carrying molecules produced in this stage are like $20 bills which cells cannot use. That is why these other energy-carrying molecules enter 2nd stage of cellular respiration.

18. How cell makes ATP from glucose?
Add notes on the right side of your cell drawing
CELLULAR RESPIRATION
Stage 2 = Electron transport Uses energy-carrying molecules from stage 1 and oxygen to produce more ATP
Happens on the inner membrane
Energy from energy-carrying molecules is transferred to chains of proteins in the inner membrane
Final products: ATP water heat (escapes)

19. Discuss with your partner
Pair-share
Discuss with your partner
1. Definition of cellular respiration
2. What is aerobic process?
3. What is the name of stage 1 of cellular respiration? Where does it happen and what are the final products?
4. What is the name of stage 2 of cellular respiration? Where does it happen and what are the final products?

20. 2. AEROBIC process needs the presence of oxygen
Pair-share
1. CELLULAR RESPIRATION Releases chemical energy from sugars (and other carbon-based molecules) to make ATP when oxygen is present
2. AEROBIC process needs the presence of oxygen
3. STAGE 1 = Krebs cycle, happens in matrix of the mitochondria. Final products are: small number of ATP, carbon dioxide and energy-carrying molecules (other than ATP)
4. STAGE 2 = Electron transport, happens on the inner membrane in mitochondria. Final products: ATP, water and heat

21. Do not write, just pay attention
Final Overview
Do not write, just pay attention
CELLULAR RESPIRATION
GLYCOLYSIS
Inside of mitochondria
In cytoplasm
Aerobic – needs O2
Anaerobic – no O2
Stage 1 = Krebs cycle (matrix) Starts: 3-carbon molecule Ends: some ATP, CO2 and energy-carrying molecules
Starts: Glucose molecule
Ends: two 3-carbon molecules and 2 ATP
Stage 2 = electron transport (inner membrane) Starts: energy-carrying molecules and oxygen Ends: ATP, water and heat
TOTAL ATP